Answer:
d = 2r
Step-by-step explanation:
diameter is two times the radius.
Answer:
A(2,4), B(-1,2). and C
Step-by-step explanation:
If a vector has terminal point with coordinates P(x,y) and an initial point at the origin (0,0), then

Therefore if

Then the coordinates of their terminal points are A(2,4), B(-1,2). and C